Demonstrate timeouts

output

$ for WORKTIME in {1..5}0; do echo -n "$WORKTIME: "; ./timeout --timeout 25 --worktime $WORKTIME; done
10: Worker finished
20: Worker finished
30: Timeout
40: Timeout
50: Timeout

timeout.go

package main

import (
        "fmt"
        "time"
        "flag"
)

var (
        workerTime = flag.Int64("worktime", 50, "Time for worker to run (ms)")
        timeout    = flag.Int64("timeout", 25, "Timeout (ms)")
)

func worker(done chan bool) {
        // simulate long-running computation
        <-time.After(*workerTime * 1e6)

        done <- true
}

func main() {
        flag.Parse()

        done := make(chan bool, 1)
        go worker(done)

        select {
        case <-done:
                fmt.Println("Worker finished")
        case <-time.After(*timeout * 1e6):
                fmt.Println("Timeout")
        }
}